Case Studies of Fungicide-Resistance Management in Japan

摘要

Developing ment of fungicide-resistance is one of the serious factors of fungicide efficacy and may damage crop-yield and -quality. The pesticide research section of ZEN-NOH Agricultural R&D Center, an experiment and research institute for pesticide of Japan Agricultural Cooperative Associations, has been conducting experiments for ranking fungicides and evaluating their characteristics and others, taking much consideration of farmers as fungicide users. The experimental results from our study on fungicide-resistant are summarized as follows :"DMIs(DeMethylation-Inhibitors) decreased sensitivity to Erysiphe graminis by spraying the same fungicide"; "DMIs sensitivity baselines and sensitivity distributions of isolates sampled over Japan were estimated in strawberry-powdery-mildew fungi"; and "Strobirulin-resistant fungi occurred in cucumber powdery and downy mildew "